Apache Shiro is is a top level open source project under the Apache Software Foundation. As a project, Shiro is an application security framework that provides application developers very clean and simple ways of supporting four cornerstones of security in their applications: authentication, authorization, enterprise session management and cryptography.
If you'd like to learn more about Shiro please visit the links below
What is Shiro - A deeper look into the project, its mission, and its history
Features - Explore the major features of the project
News - Stay up to date on the latest Apache Shiro news
Events - See what Apache Shiro events are coming that you should consider attending
License - Review the license under which Shiro is released - Apache Software License, Version 2.0